<!-- 主页 -->
<template>
    <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="primary" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse ? '64px' : '200px' " >
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409EFF"
            unique-opened
            :collapse="isCollapse"
            :collapse-transition="false"
            router
            :default-active="activePath">
            <!-- unique-opened 仅展示一组 -->
              <!-- 一级菜单 -->
            <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                  <!-- 一级菜单模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{ item.authName }}</span>
              </template>

              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subItem.path + ''"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)">
                <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                  <span>{{ subItem.authName }}</span>
              </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 左侧内容主体 -->
          <el-main>
            <!-- 子组件路由占位符 -->
            <router-view></router-view>
          </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
  name: 'MyHome',
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      //循环渲染
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse:false,
      // 被激活的链接地址
      activePath:'',
    }
  },
  // 创建生命周期函数调用接口
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      // 清空token
      window.sessionStorage.clear();
      this.$router.push("/login")
      this.$message.success('退出后台主页成功');
    },
    // 获取所有的菜单
    async getMenuList() {
      const {data: res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    // 点击切换，菜单的折叠与展开按钮
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
    background-color:dodgerblue;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color:#fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span {
        margin-left: 15px;
      }
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
  margin-right: 10px;
}

.toggle-button{
  background-color: #4a5064;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2em;
}

</style>